package com.example.score.utils;

import org.apache.commons.lang3.time.DateFormatUtils;

import java.lang.management.ManagementFactory;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

/**
 * 时间工具类
 *
 * @author andy
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {
    public static String YYYY = "yyyy";

    public static String YYYY_MM = "yyyy-MM";

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    public static String MM_DD = "MM-dd";

    public static final DateTimeFormatter FMT = DateTimeFormatter.ofPattern(MM_DD);


    private static String[] parsePatterns = {
            "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
            "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM",
            "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};

    /**
     * 获取当前Date型日期
     *
     * @return Date() 当前日期
     */
    public static Date getNowDate() {
        return new Date();
    }


    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     *
     * @return String
     */
    public static String getDate() {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime() {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }

    public static final String dateTimeNow() {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static final String dateTime(final Date date) {
        return parseDateToStr(YYYY_MM_DD, date);
    }

    public static final String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    public static final Date dateTime(final String format, final String ts) {
        try {
            return new SimpleDateFormat(format).parse(ts);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * 日期路径 即年/月/日 如2018/08/08
     */
    public static final String datePath() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyy/MM/dd");
    }

    /**
     * 日期路径 即年/月/日 如20180808
     */
    public static final String dateTime() {
        Date now = new Date();
        return DateFormatUtils.format(now, "yyyyMMdd");
    }

    public static final String dateTimeYear() {
        Date now = new Date();
        return DateFormatUtils.format(now, YYYY);
    }

    /**
     * 日期型字符串转化为日期 格式
     */
    public static Date parseDate(Object str) {
        if (str == null) {
            return null;
        }
        try {
            return parseDate(str.toString(), parsePatterns);
        } catch (ParseException e) {
            return null;
        }
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算相差天数
     */
    public static int differentDaysByMillisecond(Date date1, Date date2) {
        return Math.abs((int) ((date2.getTime() - date1.getTime()) / (1000 * 3600 * 24)));
    }

    /**
     * 计算时间差
     *
     * @param endDate   最后时间
     * @param startTime 开始时间
     * @return 时间差（天/小时/分钟）
     */
    public static String timeDistance(Date endDate, Date startTime) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - startTime.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }

    /**
     * 增加 LocalDateTime ==> Date
     */
    public static Date toDate(LocalDateTime temporalAccessor) {
        ZonedDateTime zdt = temporalAccessor.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 增加 LocalDate ==> Date
     */
    public static Date toDate(LocalDate temporalAccessor) {
        LocalDateTime localDateTime = LocalDateTime.of(temporalAccessor, LocalTime.of(0, 0, 0));
        ZonedDateTime zdt = localDateTime.atZone(ZoneId.systemDefault());
        return Date.from(zdt.toInstant());
    }

    /**
     * 获取今日的开始时间
     *
     * @return 获取今日开始时间（00:00:00）
     */
    public static Date getTodayStartTime() {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        return calendar.getTime();
    }

    /**
     * 获取今日结束时间
     *
     * @return 获取今日结束时间（23:59:59.999999999）
     */
    public static Date getTodayEndTime() {
        Calendar calendar = Calendar.getInstance();
        // 获取今日结束时间
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);
        calendar.set(Calendar.MILLISECOND, 999);
        return calendar.getTime();
    }


    /**
     * 判断开始时间和结束时间是否为同一年
     *
     * @param startDate 开始时间
     * @param endDate   结束时间
     * @return
     */
    public static boolean isSameYear(Date startDate, Date endDate) {
        if (startDate == null || endDate == null) {
            return false;
        }
        LocalDateTime start = startDate.toInstant()
                .atZone(ZoneId.systemDefault())
                .toLocalDateTime();

        LocalDateTime end = endDate.toInstant()
                .atZone(ZoneId.systemDefault())
                .toLocalDateTime();
        return start.getYear() == end.getYear();
    }

    /**
     * 获取开始时间和结束时间之间的月份
     *
     * @param startDate 开始时间
     * @param endDate   结束时间
     * @return 月份列表
     */
    public static List<String> getMonthsBetween(String startDate, String endDate) {
        List<String> months = new ArrayList<>();
        // 定义日期格式
        DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern(YYYY_MM_DD);
        DateTimeFormatter monthFormatter = DateTimeFormatter.ofPattern(YYYY_MM);
        try {
            // 解析开始和结束日期
            LocalDate start = LocalDate.parse(startDate, dateFormatter);
            LocalDate end = LocalDate.parse(endDate, dateFormatter);

            // 确保开始日期不晚于结束日期
            if (start.isAfter(end)) {
                throw new IllegalArgumentException("开始日期不能晚于结束日期");
            }
            // 转换为YearMonth并遍历
            YearMonth current = YearMonth.from(start);
            YearMonth endMonth = YearMonth.from(end);

            while (!current.isAfter(endMonth)) {
                months.add(current.format(monthFormatter));
                current = current.plusMonths(1);
            }

        } catch (Exception e) {
            throw new IllegalArgumentException("日期格式不正确，请使用yyyy-MM-dd格式", e);
        }
        return months;
    }

    /**
     * 根据任意起始时间字符串，返回该月所有日期
     *
     * @param dateTimeStr 形如 "2025-06-01 00:00:00"（只要日期部分有效即可）
     * @return 该月全部日期，格式 yyyy-MM-dd
     */
    public static List<String> listMonthDays(String dateTimeStr) {
        LocalDate date = LocalDate.parse(dateTimeStr.substring(0, 10));
        YearMonth ym = YearMonth.from(date);
        List<String> days = new ArrayList<>();
        for (int d = 1; d <= ym.lengthOfMonth(); d++) {
            days.add(ym.atDay(d).format(FMT));
        }
        return days;
    }

    public static void main(String[] args) {
        List<String> days = listMonthDays("2025-06-01");
        days.forEach(System.out::println);   // 2025-06-01 \n 2025-06-02 \n ... \n 2025-06-30
    }
}
